Seal
L-sealer
Creates the seal around individual products or grouped packs using suitable shrink film.
View related machineryL-seal lines
L-sealer and shrink tunnel lines
An L-sealer and shrink tunnel line is a common route for neat retail presentation packs, boxed goods and printed products.
UK specification advice
For clean all-round shrink presentation
The L-sealer creates a two-sided seal around the pack before the product passes through the heat tunnel, where the film shrinks around the product.
This route is often used when the finished pack needs a clean appearance rather than open-sided transit bundling.
The correct system depends on the largest product, the required output, operator loading method and film type.
Machinery route
L-sealer line components
A good result depends on the sealer, film and tunnel working together.
Shrink
Shrink tunnel
Applies controlled heat and airflow to recover the film around the product.
View related machineryFilm
POF film route
Often selected for presentation packs because it can give a clean and clear finish.
View related machineryBuying notes
L-sealer line notes
When comparing L-sealer and shrink tunnel lines, check the maximum pack dimensions and allow enough clearance for the film sleeve as well as the product.
Tunnel length, temperature and conveyor speed affect the finish. A short or undersized tunnel can leave loose film or uneven corners.
Operator loading should be considered early. For variable products, an easy-loading semi-automatic line may be more practical than a higher speed automated line.
Common questions
L-sealer and tunnel FAQs
What is an L-sealer used for?
An L-sealer is used to seal shrink film around individual products or packs before heat shrinking.
Is an L-sealer better than a chamber sealer?
It depends on output and pack size. Chamber sealers are compact, while L-sealer and tunnel lines suit higher throughput and larger packs.
What film is used with L-sealers?
POF is common for many presentation packs, though the final choice depends on product and finish.
Can L-sealer lines be semi-automatic?
Yes. Many L-sealer and tunnel systems use operator loading with automatic sealing and conveyor transfer.
Next step
Ask Lancing to recommend a shrink wrapping route
Send product dimensions, pack format, approximate output rate and film preference. Lancing can help compare chamber sealers, L-sealers, sleeve sealers, heat tunnels and complete shrink wrapping lines.